GB2575347B - Value comparison server, value comparison encryption system, and value comparison method - Google Patents

Value comparison server, value comparison encryption system, and value comparison method Download PDF

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Publication number
GB2575347B
GB2575347B GB1906828.7A GB201906828A GB2575347B GB 2575347 B GB2575347 B GB 2575347B GB 201906828 A GB201906828 A GB 201906828A GB 2575347 B GB2575347 B GB 2575347B
Authority
GB
United Kingdom
Prior art keywords
value comparison
encryption system
server
value
comparison method
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB1906828.7A
Other versions
GB201906828D0 (en
GB2575347A (en
Inventor
Sato Hisayoshi
Yoshino Masayuki
Naganuma Ken
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of GB201906828D0 publication Critical patent/GB201906828D0/en
Publication of GB2575347A publication Critical patent/GB2575347A/en
Application granted granted Critical
Publication of GB2575347B publication Critical patent/GB2575347B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/085—Secret sharing or secret splitting, e.g. threshold schemes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/008—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols involving homomorphic encryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/06—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols the encryption apparatus using shift registers or memories for block-wise or stream coding, e.g. DES systems or RC4; Hash functions; Pseudorandom sequence generators
    • H04L9/0618—Block ciphers, i.e. encrypting groups of characters of a plain text message using fixed encryption transformation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
    • H04L9/0869—Generation of secret information including derivation or calculation of cryptographic keys or passwords involving random numbers or seeds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0894—Escrow, recovery or storing of secret information, e.g. secret key escrow or cryptographic key storage
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/14—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using a plurality of keys or algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/30—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
    • H04L9/3006—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy underlying computational problems or public-key parameters
    • H04L9/3013—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy underlying computational problems or public-key parameters involving the discrete logarithm problem, e.g. ElGamal or Diffie-Hellman systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/30—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy
    • H04L9/3066—Public key, i.e. encryption algorithm being computationally infeasible to invert or user's encryption keys not requiring secrecy involving algebraic varieties, e.g. elliptic or hyper-elliptic curves
GB1906828.7A 2018-05-28 2019-05-15 Value comparison server, value comparison encryption system, and value comparison method Expired - Fee Related GB2575347B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018101649A JP2019207281A (en) 2018-05-28 2018-05-28 Large/small determination server, large/small determination encryption system and large/small determination method

Publications (3)

Publication Number Publication Date
GB201906828D0 GB201906828D0 (en) 2019-06-26
GB2575347A GB2575347A (en) 2020-01-08
GB2575347B true GB2575347B (en) 2020-12-23

Family

ID=67384541

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1906828.7A Expired - Fee Related GB2575347B (en) 2018-05-28 2019-05-15 Value comparison server, value comparison encryption system, and value comparison method

Country Status (4)

Country Link
US (1) US11184163B2 (en)
JP (1) JP2019207281A (en)
DE (1) DE102019113249A1 (en)
GB (1) GB2575347B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112395623B (en) * 2019-08-19 2023-09-29 华控清交信息科技(北京)有限公司 Data processing method and device and electronic equipment
US11671239B2 (en) 2020-05-08 2023-06-06 Samsung Electronics Co., Ltd. Encryption method and apparatus based on homomorphic encryption using odd function property
US11496287B2 (en) 2020-08-18 2022-11-08 Seagate Technology Llc Privacy preserving fully homomorphic encryption with circuit verification
US11575501B2 (en) 2020-09-24 2023-02-07 Seagate Technology Llc Preserving aggregation using homomorphic encryption and trusted execution environment, secure against malicious aggregator

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1804416A1 (en) * 2006-01-02 2007-07-04 Sap Ag System and method for comparison of private values
EP3024169A1 (en) * 2014-11-18 2016-05-25 Pitney Bowes Inc. System and method for matching data sets while maintaining privacy of each data set

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012114452A1 (en) * 2011-02-22 2012-08-30 三菱電機株式会社 Similarity calculation system, similarity calculation device, computer program, and similarity calculation method
US9281941B2 (en) * 2012-02-17 2016-03-08 International Business Machines Corporation Homomorphic evaluation including key switching, modulus switching, and dynamic noise management
EP2874341B1 (en) * 2013-09-26 2019-03-06 Koninklijke KPN N.V. Secure evaluation of a program
US11042650B2 (en) * 2018-12-06 2021-06-22 International Business Machines Corporation Sargable query-predicate evaluation for encrypted databases

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1804416A1 (en) * 2006-01-02 2007-07-04 Sap Ag System and method for comparison of private values
EP3024169A1 (en) * 2014-11-18 2016-05-25 Pitney Bowes Inc. System and method for matching data sets while maintaining privacy of each data set

Also Published As

Publication number Publication date
GB201906828D0 (en) 2019-06-26
JP2019207281A (en) 2019-12-05
DE102019113249A1 (en) 2019-11-28
US11184163B2 (en) 2021-11-23
US20190363878A1 (en) 2019-11-28
GB2575347A (en) 2020-01-08

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20230515